Question

在我的android项目中，我使用以下代码检查并请求运行时权限：

public class AgentsFragmentMapTab extends RootFragment implements  ActivityCompat.OnRequestPermissionsResultCallback 
{    
     //..
     private boolean checkAndRequestPermissions() {
            int internet = ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.INTERNET);
            int loc = ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_COARSE_LOCATION);
            int loc2 = ContextCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION);
            List<String> listPermissionsNeeded = new ArrayList<>();
            if (internet != PackageManager.PERMISSION_GRANTED) {
                listPermissionsNeeded.add(Manifest.permission.INTERNET);
            }
            if (loc != PackageManager.PERMISSION_GRANTED) {
                listPermissionsNeeded.add(Manifest.permission.ACCESS_COARSE_LOCATION);
            }
            if (loc2 != PackageManager.PERMISSION_GRANTED) {
                listPermissionsNeeded.add(Manifest.permission.ACCESS_FINE_LOCATION);
            }
            if (BuildConfig.DEBUG)
                Log.d(TAG, "checkAndRequestPermissions_listPermissionsNeeded(" + listPermissionsNeeded.size() + ")");
            if (!listPermissionsNeeded.isEmpty()) {
                ActivityCompat.requestPermissions(getActivity(), listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]), LOCATION_REQ_CODE);
                return false;
            }
            return true;
        }

        @Override
        public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {

            if (requestCode == LOCATION_REQ_CODE) {

                } else {

                }
            }
        }

此代码完美显示了权限对话框。但是，当我单击允许或拒绝按钮时，方法onRequestPermissionsResult()不会被调用。为什么不调用它以及如何实现呢？

Answer 1

如父活动中的覆盖onRequestPermissionsResult的注释中所述

请确保从此活动的super.onRequestPermissionsResult呼叫onRequestPermissionsResult

然后它将发送到覆盖onRequestPermissionsResult

的片段

已编辑：

这就是我所做的

我叫requestPermissions(StringOfPermissions,YourRequestCode);

片段内

这是我用来在活动中添加片段的代码，很简单

getSupportFragmentManager()
            .beginTransaction()
            .add(R.id.container, BlankFragment.newInstance("",""))
            .disallowAddToBackStack()
            .commit();

我覆盖了onRequestPermissionsResult（）：

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}

活动和片段内

当我从片段中请求时，它进入活动，然后进入片段

Answer 2

更改

 ActivityCompat.requestPermissions(getActivity(), listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]), LOCATION_REQ_CODE);

收件人：

requestPermissions(listPermissionsNeeded.toArray(new String[listPermissionsNeeded.size()]), REQUEST_CODE);

还有ContextCompat至ActivityCompat和getActivity()至getContext()，例如：

int loc2 = ActivityCompat.checkSelfPermission(getContext(), Manifest.permission.ACCESS_FINE_LOCATION, LOCATION_REQ_CODE);

Answer 3

首先，在父活动中执行此操作。

...
Fragment theFragment = 
     getSupportFragmentManager().findFragmentById(R.id.your_fragment_name);
...         

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    switch (requestCode) {
        case LOCATION_REQ_CODE: {
            if (grantResults.length > 0
                && grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                if(theFragment instanceof AgentsFragmentMapTab) 
                    ((AgentsFragmentMapTab)theFragment).passPermissionResult(true);

            } else {
                if(theFragment instanceof AgentsFragmentMapTab) 
                    ((AgentsFragmentMapTab)theFragment).passPermissionResult(false);
            }
            return;
        }
    }
}

然后在您的片段中，添加一个公共方法，如下所示：

public void passPermissionResult(boolean allowed) {
    if(allowed) {
        // ALLOW clicked
    }
    else {
        // DENY clicked
    }
}

不从片段调用onRequestPermissionsResult

3 个答案: